Soil improving agent for agricultural fields of secondary salinization lands in Hetao irrigation area

Abstract

The invention relates to a soil improving agent for agricultural fields of secondary salinization lands in a Hetao irrigation area. The soil improving agent is prepared from the following components in mass by percent: 26 to 35 percent of gypsum, 5 to 10 percent of coal ash, 10 to 20 percent of humic acid, 22 to 40 percent of furfural residue, 5 to 10 percent of calcium superphosphate and 10 to 25 percent of polyacrylic acid as well as 1 to 2 percent of boric acid, 1 to 2 percent of zinc sulfate and 1 to 2 percent of manganese sulfate. The soil improving agent has the advantages that by utilization of acidic substances such as the humic acid, the furfural residue and the like, the pH (Potential of Hydrogen) of soil is reduced; the calcium superphosphate and the gypsum contain a large amount of calcium elements which can substitute sodium ions in the soil, so that the degree of alkalization is reduced and the alkalized soil is improved; the soil capacity can be reduced by the coal ash, the porosity can be increased, and the activity of microorganisms in the soil can be improved, so that good soil environment can be created for crop growth; by utilization of the polyacrylic acid, the evaporation of soil moisture can be reduced, the accumulation of salt to the surface soil along with capillary water evaporation can be reduced; and by the calcium superphosphate, the boric acid, the zinc sulfate and the manganese sulfate, the soil fertility can be improved.

Description

technical field [0001] The invention relates to a soil improver, in particular to a farmland soil improver for secondary saline-alkali land in Hetao irrigation area. Background technique [0002] Secondary salinization refers to the process of soil salinization caused by unreasonable cultivation and irrigation. The Hetao Plain is located near the fault. Due to the passage of the Yellow River, sediment deposits form a plain. In arid areas, if unreasonable irrigation such as flood irrigation is not conducive to drainage, the groundwater level will rise and the salt in the deep soil will be released. When it is brought to the surface of the soil, because of less precipitation and strong evaporation, the groundwater level will drop, and the salt will be enriched in the surface of the soil, forming soil salinization. The measures to prevent secondary salinization of soil mainly include water conservancy engineering measures, agronomic measures, biological measures and chemical i...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the single-function defect of the existing secondary saline-alkali farmland soil improver, and provide a secondary saline-alkali farmland soil improver in the Hetao irrigation area